Telstra T-Box Getting Started Manual page 13

Component (optional)
Using the Mini DIN to component cable, connect the round black plug to your
T-Box device. Connect the RED/GREEN/BLUE video cables to the TV video inputs
and the RED/WHITE audio cable to the TV audio inputs.
Composite (doesn't support HD)
Using the Mini DIN to composite cable, connect the round black plug to your
T-Box device. Connect the YELLOW video cable to the TV video input and the
RED/WHITE audio cable to the TV audio inputs.
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